Did low HGB cause A-Fib/flutter?

I took my mom to the ER the other day with new onset A-fib/flutter. Her max HR was 204 with amb, and she was SOB, but she compensated well; her BIOX with the flutter and amb was 99%. While I had to leave the ER for about a half hour (after 5 hours in there, still waiting for labs!), the Doc told her her hgb was 7, and she was going to order her 2 Units prbcs. Mom OK'd it. They transferred her to the ICU (r/t cardizem gtt,) and then began her PRBCs transfusion after ICU admit. Can a low HGB cause A-fib/flutter, even if her sats were 99%? She never was given O2 the entire 3 day, 2 night stay in the hospital, although her BIOX was monitored constantly in ICU and then Q4h on the floor. Sats were always great. IF a low HGB CAN cause A-fib, can you please tell me the mechanism of action, as it obviously wasn't lack of oxygen to the cells, if her BIOX was 99% meaning her Kreb's cycle was likely spot-on. Incidentally, her HR was usu between 85-130 while in A-fib; it only increased with physical activity. She converted back to NSR after several hours of the cardizem gtt, and 1 unit of PRBCs. I ask because Mama is an 'old nurse' ( hasn't practiced in years,) and I followed her footsteps into nursing. I told her she could have rebuilt her HGB without the transfusion, using her now-present regimen of FESO4 and Vit C. She thinks because the Doc said she needed transfused, that it "had to be done." Mother never would DREAM of questioning a Doc, or arguing a point with one. Please educate us. Thank you in advance for your help.

The Oxygen saturation measure is % of carriers HGB carrying oxygen. So, if the red blood cells are low in number a high O2 would not mean enough O2 is being provided to the cells of the body. I do not know if this is related to AFib, a condition I have with normal hemoglobin/rbc count.

I had a low HGB about 20 years ago, it was around 6 or 7, don't recall at the minute. I was given a transfusion of blood to get the count up. I then underwent a full exam to find out where my blood was going...nothing was found other than iron anemia - the anemia was corrected with over-the-counter iron supplement and my HBG has been around 14 since that time. I was diagnosed with AFib about 15 years ago, there was never a connection drawn between my HBG shortfall and AFib, but I don't know there is no connection - something I might ask my cardiologist on my next visit.

The Oxygen saturation measure is % of carriers HGB carrying oxygen. So, if the red blood cells are low in number a high O2 would not mean enough O2 is being provided to the cells of the body. I do not know if this is related to AFib, a condition I have with normal hemoglobin/rbc count.

I had a low HGB about 20 years ago, it was around 6 or 7, don't recall at the minute. I was given a transfusion of blood to get the count up. I then underwent a full exam to find out where my blood was going...nothing was found other than iron anemia - the anemia was corrected with over-the-counter iron supplement and my HBG has been around 14 since that time. I was diagnosed with AFib about 15 years ago, there was never a connection drawn between my HBG shortfall and AFib, but I don't know there is no connection - something I might ask my cardiologist on my next visit.

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